:root {
  --paper: #eee8d7;
  --ink: #152321;
  --plum: #5d315c;
  --pink: #d64b79;
  --orange: #ed7844;
  --cyan: #25a8a8;
  --acid: #dce64a;
  --line: rgba(21, 35, 33, 0.32);
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
body {
  margin: 0;
  color: var(--ink);
  background:
    linear-gradient(rgba(238,232,215,.94), rgba(238,232,215,.94)),
    repeating-linear-gradient(90deg, transparent 0 47px, rgba(21,35,33,.045) 47px 48px),
    var(--paper);
  font-family: "Courier New", Courier, monospace;
}
a { color: inherit; text-underline-offset: .2em; }
button, input, select { font: inherit; }
.masthead, main, footer { width: min(1220px, calc(100% - 34px)); margin-inline: auto; }
.masthead { display: flex; justify-content: space-between; gap: 20px; padding: 18px 0; border-bottom: 1px solid var(--ink); font-size: .72rem; font-weight: 800; text-transform: uppercase; }
.masthead a { text-decoration: none; }
.masthead nav { display: flex; flex-wrap: wrap; gap: 8px 18px; }
.hero { display: grid; grid-template-columns: 1.55fr .75fr; gap: 40px; align-items: end; min-height: 430px; padding: 62px 0 46px; }
.serial { margin: 0 0 12px; font-size: .7rem; font-weight: 800; letter-spacing: .14em; }
h1 { margin: 0; font: 900 clamp(4.5rem, 12vw, 9rem)/.72 Arial Black, Impact, sans-serif; letter-spacing: -.08em; text-transform: uppercase; }
.hero > p { max-width: 420px; margin: 0 0 8px; font: italic clamp(1.4rem, 3vw, 2.25rem)/1.15 Georgia, serif; }
h2 { margin: 0; font: 900 clamp(1.6rem, 4vw, 3rem)/.95 Arial Black, Impact, sans-serif; letter-spacing: -.035em; text-transform: uppercase; }

.intake { padding: 25px; border: 2px solid var(--ink); background: rgba(255,255,255,.23); box-shadow: 10px 10px 0 var(--plum); }
.control-heading { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; align-items: end; margin-bottom: 24px; padding-bottom: 16px; border-bottom: 1px solid var(--ink); }
.control-heading p { margin: 0; font-size: .72rem; text-align: right; }
.file-control { display: grid; gap: 8px; font-size: .75rem; font-weight: 800; text-transform: uppercase; }
.file-control input { width: 100%; padding: 13px; border: 1px dashed var(--ink); background: var(--paper); }
.primary-controls, .advanced-controls { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; margin-top: 24px; }
.primary-controls label, .advanced-controls label { display: grid; grid-template-columns: 1fr auto; gap: 8px; align-content: start; font-size: .7rem; font-weight: 800; text-transform: uppercase; }
input[type="range"] { grid-column: 1 / -1; width: 100%; accent-color: var(--pink); }
select { grid-column: 1 / -1; min-height: 38px; padding: 7px; border: 1px solid var(--ink); color: var(--ink); background: var(--paper); }
details { margin-top: 24px; border-top: 1px solid var(--line); }
summary { width: fit-content; padding: 12px 0 0; font-size: .72rem; font-weight: 800; cursor: pointer; }
.advanced-controls { grid-template-columns: repeat(3, 1fr); }
.advanced-controls .check { display: flex; grid-column: span 2; align-items: center; }
.actions { display: flex; justify-content: flex-end; gap: 10px; margin-top: 26px; }
.actions button, .download { min-height: 48px; padding: 13px 18px; border: 0; color: white; background: var(--plum); font-weight: 900; text-decoration: none; text-transform: uppercase; cursor: pointer; }
.actions button:disabled { opacity: .4; cursor: not-allowed; }
.actions .cancel { background: #a62e35; }
progress { width: 100%; height: 14px; margin-top: 14px; accent-color: var(--pink); }
#status { margin: 14px 0 0; padding: 11px 13px; border: 1px solid var(--line); font-size: .75rem; line-height: 1.45; }
#status[data-kind="error"] { color: #84262c; border-color: #a62e35; }
#status[data-kind="ready"] { border-color: var(--cyan); }

.comparison { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 72px; }
.comparison article { min-width: 0; border: 1px solid var(--ink); background: white; }
.pane-title { display: flex; justify-content: space-between; gap: 16px; align-items: baseline; min-height: 62px; padding: 13px 15px; border-bottom: 1px solid var(--ink); }
.pane-title span { font-size: .72rem; font-weight: 900; text-transform: uppercase; }
.pane-title p { margin: 0; font-size: .66rem; text-align: right; }
.canvas-stage { display: grid; place-items: center; min-height: 460px; padding: 18px; overflow: hidden; background: repeating-conic-gradient(#d2cbd4 0 25%, #f2eef0 0 50%) 0 / 22px 22px; }
canvas { display: block; max-width: 100%; max-height: 620px; width: auto; height: auto; image-rendering: auto; }

.palette-section, .receipt, .method { margin-top: 72px; }
.palette-section { display: grid; grid-template-columns: .9fr 1.4fr; gap: 36px; padding-top: 22px; border-top: 2px solid var(--ink); }
.palette-section p { max-width: 470px; line-height: 1.55; }
.palette { display: grid; grid-template-columns: repeat(10, minmax(20px, 1fr)); min-height: 150px; margin: 0; padding: 0; border: 1px solid var(--ink); list-style: none; background: rgba(255,255,255,.25); }
.palette li { min-height: 72px; border: 1px solid rgba(255,255,255,.2); }
.receipt { display: grid; grid-template-columns: .5fr 1.5fr auto; gap: 24px; align-items: center; padding: 22px; color: white; background: var(--plum); }
.receipt dl { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; margin: 0; background: rgba(255,255,255,.3); }
.receipt dl div { padding: 12px; background: var(--plum); }
.receipt dt { font-size: .61rem; text-transform: uppercase; }
.receipt dd { margin: 7px 0 0; font-size: 1.05rem; font-weight: 900; }
.download { color: var(--ink); background: var(--acid); text-align: center; }

.method { padding-top: 24px; border-top: 2px solid var(--ink); }
.method > ol { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; margin: 28px 0 0; padding: 1px; background: var(--ink); list-style: none; counter-reset: method; }
.method li { min-height: 220px; padding: 18px; background: var(--paper); counter-increment: method; }
.method li::before { content: "0" counter(method); display: block; margin-bottom: 44px; color: var(--pink); font-weight: 900; }
.method strong { display: block; font: 900 1.25rem/1 Arial Black, Impact, sans-serif; text-transform: uppercase; }
.method span { display: block; margin-top: 11px; font-size: .72rem; line-height: 1.5; }
.boundary { max-width: 820px; margin: 28px 0 0 auto; padding: 18px 0 0 24px; border-left: 8px solid var(--orange); line-height: 1.6; }
footer { display: flex; justify-content: space-between; margin-top: 90px; padding: 18px 0 35px; border-top: 1px solid var(--ink); font-size: .7rem; font-weight: 800; }

@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; min-height: 380px; }
  .primary-controls { grid-template-columns: repeat(2, 1fr); }
  .advanced-controls { grid-template-columns: repeat(2, 1fr); }
  .comparison { grid-template-columns: 1fr; }
  .canvas-stage { min-height: 380px; }
  .receipt { grid-template-columns: 1fr; }
  .method > ol { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 600px) {
  .masthead, main, footer { width: min(100% - 20px, 1220px); }
  .masthead { align-items: flex-start; }
  .masthead span { max-width: 44%; text-align: right; }
  .hero { min-height: 330px; padding-top: 44px; }
  h1 { font-size: clamp(3.3rem, 14vw, 5rem); }
  .control-heading, .primary-controls, .advanced-controls, .palette-section, .method > ol { grid-template-columns: 1fr; }
  .control-heading p { text-align: left; }
  .advanced-controls .check { grid-column: auto; }
  .actions { display: grid; grid-template-columns: 1fr; }
  .canvas-stage { min-height: 300px; padding: 10px; }
  .palette { grid-template-columns: repeat(5, 1fr); }
  .receipt dl { grid-template-columns: repeat(2, 1fr); }
  .method li { min-height: 180px; }
}